浅层地热能地下换热系统适宜性评价与优化设计——以郑州市浅层地热能示范工程为例
投稿时间:2022-01-19  修订日期:2022-04-12  点此下载全文
引用本文:卢玮,尚永升,申云飞.浅层地热能地下换热系统适宜性评价与优化设计——以郑州市浅层地热能示范工程为例[J].钻探工程,2022,49(3):146-153.
LU Wei,SHANG Yongsheng,SHEN Yunfei. Suitability evaluation and optimization design of the shallow geothermal energy underground heat exchange system—Taking Zhengzhou shallow geothermal energy demonstration project as an example[J]. Drilling Engineering, 2022,49(3):146-153.
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作者单位E-mail
卢玮 河南省地矿局第二地质环境调查院河南 郑州 450053
河南省深部探矿工程技术研究中心河南 郑州 450053 
21542173@qq.com 
尚永升 河南省地矿局第二地质环境调查院河南 郑州 450053
河南省地热能开发工程技术研究中心河南 郑州 450053 
 
申云飞 河南省地矿局第二地质环境调查院河南 郑州 450053
河南省深部探矿工程技术研究中心河南 郑州 450053 
46345450@qq.com 
基金项目:河南省自然资源厅自然资源科技项目“河南省地热资源监测技术研究与示范”(编号:豫自然资函[2021]157号-3);郑州市财政项目“郑州市多要素城市地质调查浅层地热能示范工程建设”(编号:郑财招标采购-2020-439)
中文摘要:地热资源的开发利用对减少CO2排放和抑制全球气候变化能起到积极的作用。目前,国内浅层地热能地下换热主要有地下水换热系统和地埋管换热系统2种方式,其共同优点是能源利用系数高、安全稳定、零污染排放等,但在换热效率、开发利用条件、空间占用等方面各有利弊。本文叙述了浅层地热能地下换热系统适宜性评价指标,结合郑州市浅层地热能示范工程建设项目,分别进行了抽水与回灌试验、岩土热物性参数测试、地层热响应试验等现场试验,对浅层地热能2种换热方式的适宜性进行了分析比较,得出建设区岩土具有较高的导热系数和容积比热容,有利于热量的传导与保持;但区域水位埋深浅,现场试验回灌量仅107.37 m3/d,回灌能力较差。相比之后,优化设计并选择了更适用于建设区浅层地热能开发利用的地下埋管换热系统。
中文关键词:浅层地热能  地下换热系统  地下水换热系统  地埋管换热系统  回灌试验  岩土热物测试  优化设计  郑州市
 
Suitability evaluation and optimization design of the shallow geothermal energy underground heat exchange system—Taking Zhengzhou shallow geothermal energy demonstration project as an example
Abstract:The development and utilization of geothermal resources can play a positive role in reducing CO2 emissions and restraining global climate change. Underground heat transfer of shallow geothermal energy mainly includes the groundwater well system and the underground buried pipe system. Their common advantages are high energy utilization coefficient, safety and stability, zero pollution discharge, etc.; however it has advantages and disadvantages in heat exchange efficiency, development and utilization conditions, space occupation and so on. This paper describes the suitability evaluation index of the shallow geothermal energy underground heat exchange system; and in the execution of the shallow geothermal energy demonstration project in Zhengzhou, field tests such as pumping and reinjection test, geotechnical thermophysical parameter test and formation thermal response test were carried out respectively, and the suitability of two heat exchange modes of shallow geothermal energy is analyzed and compared, It is concluded that the rock and soil in the construction area has high thermal conductivity and volume specific heat capacity, which is conducive to heat conduction and maintenance; but the buried depth of the regional water level is shallow, the reinjection capacity is only 107.37m3/d, and is poor. Through comparison, the underground buried pipe heat exchange system which is more suitable for the development and utilization of shallow geothermal energy in the construction area has been finally optimized and selected for development.
keywords:shallow geothermal energy  underground heat exchange system  groundwater heat exchange system  buried pipe heat exchange system  reinjection test  geotechnical thermophysical test  optimize design  Zhengzhou city
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